Alasan yang diberi ialah pihak berkuasa tidak membenarkan Mazlan memasuki Sarawak.
Dalam FB peribadinya Mazlan menulis bahawa
"Saya di tahan oleh Pihak Imigresen setibanya di Airport Sibu jam 11.25 pagi ini. Alasan, arahan Pejabat Ketua Menteri Sarawak."
"Saya tidak dikehendaki oleh Kerajaan Sarawak, kata pegawai Imigresen.
Saya yakin ia ada kaitan dengan Himpunan Tanah Sarawak yang dirasmikan, Presiden PAS di Beting Maro esok.
Sebelum ini beliua telah ditahan atas alasan yang sama.'
PAS leader Mazlan Aliman denied entry into Sarawak
PETALING JAYA: PAS central committee member Mazlan Aliman has allegedly been barred again from entering Sarawak on Saturday.
According to his Facebook posting, Mazlan claimed that the orders came from the Sarawak government.
"I was detained by the Immigration authorities upon arrival at Sibu Airport at 11.25am.
"The Immigration officer said the Sarawak government does not want me," he added.
He said he believed that the entry ban had something to do with Sarawak rally over land rights that will be officiated by PAS president Datuk Seri Abdul Hadi Awang in Beting Maro on Sunday.
Mazlan also posted a photo, in what appeared to be an official letter from the Sibu Airport Immigration Office, citing the reason behind the ban was on "security reasons".
"Just landed at Senai Airport at 2.05pm after being chased out of Sarawak...I've been classified as a terrorist!" he said.
On July 6, 2011, Mazlan, who is also the Persatuan Anak Peneroka Felda Kebangsaan (Anak)'s president, was denied entry to Sarawak soon after he landed at Miri Airport.